creates openings for lots of this sort of player malfeasance -

bc of the portal, guys who have decided they are moving on can be completely checked out on any sense of loyalty or obligation to the team or program they are in WHILE they are still a part of it. If they feel like they have an ax to grind and don't feel any commitment to the program they are in, there will be plenty of opportunities for them to do the sorts of things it is alleged that Crew did (the exact nature and extent of what he did isn't entirely relevant here).

The programs and institutions of CFB will need to become more systematic in addressing it. How exactly, I dunno - but it seems that at a bare minimum, requiring players to sign a written understanding that they will not share or discuss team information with anyone unaffiliated with the program without specific clearance from their coaching staff or other appropriate admin.

Given the hundreds of millions of dollars in play with the outcomes of a CFB season, this isn't small time stuff. The keys, formations, and reads of an offense or a defense are, essentially, trade secrets. And any player out there sharing them with the competition can do material harm that can cost a program millions of dollars.